From 90b6e1bd78789a93b5f87f7c3e1fd4d506736c6a Mon Sep 17 00:00:00 2001
From: William Desportes <williamdes@wdes.fr>
Date: Thu, 12 Jan 2023 09:54:36 +0400
Subject: [PATCH] Add a css-lint workflow

---
 .github/workflows/lint.yml | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 463cdb1ba..fa7d5586d 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -25,3 +25,34 @@ jobs:
         run: find . -name '*.php' -print0 | xargs -0 -r -n1 php -l
       - name: Lint all themes
         run: ./lint-theme.sh --all
+
+  css-check:
+    name: Check CSS files
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Set up Node
+        uses: actions/setup-node@v3
+        with:
+          node-version: 16
+
+      - name: Get Yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "dir=$(yarn cache dir)" >> $GITHUB_OUTPUT
+
+      - name: Cache Yarn dependencies
+        uses: actions/cache@v3
+        with:
+          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-yarn-
+
+      - name: Install modules
+        run: yarn global add postcss postcss-cli autoprefixer --non-interactive
+
+      - name: Run postcss
+        # postcss also checks for syntax errors
+        run: postcss */css/*.css setup/styles.css --use autoprefixer --replace